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Element Compound Review
Test Description: Elements and compounds
Instructions: Answer all questions to get your test result.
1) An element is a _________ substance.
A
pure
B
atomic
C
mixture
D
not pure
2) Molecules are the smallest part of a ______________.
A
substance
B
element
C
compound
D
mixture
3) Compounds are made of two or more elements _____________ bound together.
A
chemically
B
mixed
C
combined
D
melted
4) A chemical formula is _____________________.
A
a series of numbers that give us a product.
B
a series of chemical symbols and subscripts that show what reaction takes place.
C
a series of letters that equal a substance.
D
a series of symbols that show us what is in the mixture.
5) The chemical formula for water is H2O. How many atoms are in a molecule of water?
A
3
B
5
C
2
D
4
6) Elements are represented by letters, either a capital or capital and lower case, called ________ __________.
A
chemical substitues
B
chemical letters
C
chemical symbols
D
chemical equations
7) Which of the following is a compound?
A
calcium
B
hydrogen
C
sodium
D
carbon dioxide
8) Which of the following is an element?
A
sulfur
B
calcium carbonate
C
carbon dioxide
D
sodium acetate
9) Baking soda, NaHCO3, has how many carbon atoms?
A
1
B
4
C
3
D
2
10) Baking soda, NaHCO3, has how many hydrogen atoms?
A
1
B
2
C
4
D
3
*select an answer for all questions
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